[Elecraft] P3 Reference Calibraton Error
Bill W4ZV
btippett at alum.mit.edu
Thu Aug 12 10:22:06 EDT 2010
Bill W4ZV wrote:
>
> 3. Adjustment resolution of the P3's Ref Cal steps. Adjustment steps are
> 10 Hz (at the P3's 60 MHz clock). At WWV's 15 MHz (1/4 of 60 MHz), each
> adjustment step is 1/4 of 10 Hz = 2.5 Hz, which results in a maximum 1/2
> step uncertainty (1.25 Hz) in adjustment resolution when centering the P3
> display.
>
Both Al's previous post which I missed and a PM from Lyle correct the above:
"The P3 is dealing with the 8.215 kHz IF frequency regardless of the signal
frequency that is displayed on the center of the screen, so the steps are
more like ((8.215/60)*10=) 1.4 Hz."
73, Bill
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